Experimental Investigation of a Monopropellant Thruster Using Nitrous Oxide

Hennemann, Luciano; Andrade, José Carlos de; Costa, Fernando de Souza

doi:10.5028/jatm.v6i4.382

Cited by 15 publications

(1 citation statement)

References 18 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To obtain heat flux used in Eqs. ( 2), ( 3), (6), and (9) this term is multiplied by the whole inner surface for SNE and the part of inner surface in contact with the bottom part of the fluid for PIM. The model constants C sf and n are assumed to be 0.01 and 1, respectively.…”

Section: X(p H) =mentioning

confidence: 99%

Novel model for emptying of a self-pressurised nitrous oxide tank

2023

Archives of Thermodynamics

View full text Add to dashboard Cite

Nitrous oxide is often used in the space industry, as an oxidiser or monopropellant, mostly in self-pressurised configurations. It has potential for growth in use due to the recent rising interest in green propellants. At the same time, modelling the behaviour of a self-pressurising nitrous oxide tank is a challenging task, and few accurate numerical models are currently available. Two-phase flow, heat transfer and rapid changes of mass and temperature in the investigated system all increase the difficulty of accurately predicting this process. To get a get better understanding of the emptying of a self-pressurised nitrous oxide tank, two models were developed: a phase equilibrium model (single node equilibrium), treating the control volume as a single node in equilibrium state, and a phase interface model, featuring a moving interface between parts of the investigated medium. The single node equilibrium model is a variation of equilibrium model previously described in the literature, while the phase interface model involves a novel approach. The results show that the models are able to capture general trends in the main parameters, such as pressure or temperature. The phase interface model predicts nitrous oxide as a liquid, a two-phase mixture, and vapour in the lower part of the tank, which is reflected in the dynamics of changes in pressure and mass flow rate. The models developed for self-pressurisation, while created for predicting nitrous oxide behaviour, could be adapted for other media in conditions near vapourliquid equilibrium by adding appropriate state equations.

show abstract

Section: X(p H) =mentioning

confidence: 99%